Maybe someone will find this useful later if they have same issue. Dealer contacted KTM who asked for some extra tests to make sure it wasn't something else. Ended up swapping gauge cluster with another bike and of course it worked fine. New gauge cluster ordered under warranty.

Comrade: Believe it or not you are not the first person to have this problem. In fact, I'd say that this forum knows about several hundred over the years. It just seems to be something that KTM cannot get their engineering heads around so they keep on getting supplies from instrument manufacturers that just leak or don't work.

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